HP XP P9500 Storage - Manual (Page 48)

To execute the Disconnect External Storage Systems command, see “Disconnecting external
storage system or external volume” (page 50) .
4. Perform other operations that are required before turning off the local storage system, if there
is some.
5. Turn off the power supply of the external storage system.
CAUTION: After you have executed the Disconnect External Storage Systems command, but you
need to use the mapped external volume again, execute the Reconnect External Storage Systems
command.
To turn on the power supply of the external storage system to restart from the turned-off
status:
1. Turn on the external storage system that contains the external volume, which is mapped as an
internal virtual volume.
2. Execute the Reconnect External Storage Systems command.
To execute the Reconnect External Storage Systems command, see “Checking connection
status and resuming external volume operation” (page 52) .
3. When you define an external volume as a pool volume of the THP pool in the local storage
system, restore all blocked V-VOLs.
To restore all V-VOLs in the pool at once:
a.
Click Pools in the Storage Systems tree.
The list of available pools appears in the tree.
b. In the tree, select a pool to be restored.
c. Click the Virtual Volumes tab.
d. Click Select All Pages.
e. From the menu bar, select Actions
→Logical Device→Restore LDEVs.
The Restore LDEVs window opens.
f. Confirm the settings and enter the task name in the Task Name box.
g. Click Apply in the Confirm window.
CAUTION: When the external storage system is turned off after the Disconnect External Storage
Systems command is executed, you cannot access the mapped external volume from the local
storage system as you just turn the external storage system on. It is necessary to execute the
Reconnect External Storage Systems command to resume using the mapped external volume. The
Reconnect External Storage Systems command checks the defined information and the actual status
of the external volume mapped as an internal volume. If the external volume is ready to be used
as a mapped volume, the volume is set to accept the I/Os and you can resume using the volume
as a mapped volume.
Turning on or off only the local storage system
To turn off the power supply of the local storage system (to turn off purposely):
1. Stop the read or write I/O to the external volume that is mapped as a local storage system
internal virtual volume.
2. Perform other operations that are required before turning off the local storage system, if there
is some.
3. Turn off the power supply of the local storage system.
NOTE: All the data for the external volume in the local cache memory is written in the external
volume (all the data is destaged).
48 Performing External Storage operations